MDL-68808 forms: autocomplete throwing error in IE11

lib/amd/src/form-autocomplete.js

@@ -148,9 +148,16 @@ function($, log, str, templates, notification, LoadingIcon) {
             M.core_formchangechecker.set_form_changed();
         }
 
-        // Note, jQuery .change() was not working here. Better to
-        // use plain JavaScript anyway.
-        originalSelect[0].dispatchEvent(new Event('change'));
+        // Note, jQuery .change() was not working here.
+        var event;
+        if (typeof Event === 'function') {
+            event = new Event('change');
+        } else {
+            // Support IE.
+            event = document.createEvent('Event');
+            event.initEvent('change', true, true);
+        }
+        originalSelect[0].dispatchEvent(event);
     };
 
     /**